Useful tips

How does a Duke engine work?

How does a Duke engine work?

The Duke is a five-cylinder engine, with the cylinders arranged like the chambers in the cylinder of a revolver. The cylinder group rotates counter to the crankshaft, at about 20 percent of crankshaft rotational speed. In operation, the engine is so smooth, no counterbalancer is required.

Why do diesel engines have long stroke?

It creates more space, allowing for bigger valve openings, which in turn can bring more fuel and air into the cylinder. This doesn’t work well at low rpm but does at high rpm. Conversely, a long stroke is generally better for fuel efficiency, because it reduces surface area during combustion.

Why do long stroke engines have more torque?

Under Square or Long-stroke Engine ‘It’s because of the higher peak piston acceleration. A long bore engine, as the name suggests, has a longer cylinder. These engines reach their peak torque at a lower rpm when compared to a short-stroke engine. These engines have a higher volume to surface area ratio.

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Why 2 stroke engine is not used in cars?

Originally Answered: Why don’t cars use 2 stroke engines? Two stroke engine is unable to fulfill the current requirements of power, speed, pickup, efficiency and more prominent point is that emissions from its exhaust is too much compared to 4 stroke engines either petrol or diesel.

What is a diesel engine made of?

Petroleum products normally used as fuel for diesel engines are distillates composed of heavy hydrocarbons, with at least 12 to 16 carbon atoms per molecule. These heavier distillates are taken from crude oil after the more volatile portions used in gasoline are removed.

What are the types of engines?

Types of engines and how they work

  • Thermal engines. Internal combustion engines (IC engines) External combustion engines (EC engines) Reaction engines.
  • Electrical engines.
  • Physical engines.

Why do diesel engines typically last longer than gasoline equivalents?

The Modern Diesel Engine Diesel engines have always been more fuel efficient, durable and delivered more hauling power (torque) than gasolines. Typically, they contain less toxic pollutants but they did (in the past) have higher quantities of carbon (soot) in their exhaust than gasoline engines.

What are the advantages of long stroke engine?

Now, while the power produced by a typical long stroke engine is relatively less, it has its own advantages. These engines produce a much healthier torque at the lower range of the rev spectrum lending themselves to torquey, lazy revving machines very well.

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What is are the advantage of super long stroke engine as used in main propulsion of a ship?

Low quality fuel can be burnt as more time is available for fuel combustion. Slow rpm is possible so large diameter propeller can be used and hence propeller efficiency increases. More time for heat dissipation to cooling water.

What are the advantages of 4-stroke engine?

More fuel efficiency :- 4 stroke engines have greater fuel efficiency than 2 stroke ones because fuel is consumed once every 4 strokes. Less pollution :- As power is generated once every 4 strokes & also as no oil or lubricant is added to the fuel; 4 stroke engine produces less pollution.

What are the advantages and disadvantages of two stroke engines?

Advantages And Disadvantages Of Two-Stroke Engine Over Four-Stroke Engine

  • Simple mechanism.
  • Easy to start.
  • It gives one power stroke per revolution of the crankshaft.
  • It has no valves, so complicated valve actuating mechanism not required.
  • It is light weight, 30\% lighter than the 4-stroke engine.

What are the advantages and disadvantages of a 4 stroke engine?

ADVANTAGES OF 4 STROKE ENGINE :-. More torque :- In general, 4 stroke engines always make extra torque than 2 stroke engine at low RPM. Although 2 stroked ones give higher torque at higher RPM but it has a lot to do with fuel efficiency.

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How is the power produced in a 2 stroke engine?

Power is produced once every 4 strokes of the piston. Power is produced once during 2 strokes of the piston. Engine design is a bit complicated due to valve mechanism which is operated through gear & chain mechanism. 2 stroke engine has ports which makes it’s design simpler. No need of adding oil or lubricant to fuel. Addition of oil is required.

Do 2 stroke engines need to be lubricated?

2 stroke engine has ports which makes it’s design simpler. No need of adding oil or lubricant to fuel. Addition of oil is required. Top side of the piston is flat. A bump or protuberance may be needed on top side of piston.

How long can a 4-stroke engine run at 100 rpm?

If an engine can go for 10000 rpm’s before it wears out; a 4 stroke engine with 100 rpm will run for 100 minutes than the other 2 stroke engine which has a higher rpm of 500 & will run for only 20 minutes. No extra addition of oil :- Only the moving parts need lubrication intermediately.